Question

angles 1 and 2 are supplementary. which equation represents the relationship between their measures? m∠1 + m∠2 = 90° m∠1 + m∠2 = 180° m∠1 + m∠2 = 100° m∠1 + m∠2 = 200°

Explanation:

Step1: Recall definition of supplementary angles

Supplementary angles add up to 180 degrees.

Answer:

$m\angle1 + m\angle2=180^{\circ}$